net: Do not BUG() if unsupported link type met

But rather exit gracefully.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

net.c

@@ -243,9 +243,11 @@ static int restore_link(NetDeviceEntry *nde, int nlsk)
 		return restore_one_link(nde, nlsk, NULL);
 	case ND_TYPE__VETH:
 		return restore_one_link(nde, nlsk, veth_link_info);
+	default:
+		pr_err("Unsupported link type %d\n", nde->type);
+		break;
 	}
 
-	BUG();
 	return -1;
 }